Remove calls to SSP in the SAML2 container
Remove calls to SSP in the SAML2 container

EngineBlock already implements its own redirect and POST mechanisms,
so instead of proxying the methods to SSP, we now throw an exception
to make sure EB will never try to use SSP.

The 'generateId()' method is now implemented in EngineBlock, because
the SAML2 library doesn't provide it and we don't want to depend on
SSP for this single purpose.

thijskh/OpenConext-engineblock,thijskh/OpenConext-engineblock,thijskh/OpenConext-engineblock,thijskh/OpenConext-engineblock